AD NUMBER: 2009-13-09

MANUFACTURER: Microturbo SA Saphir 2 Model 016 Auxiliary Power Units
SUBJECT: Airworthiness Directive 2009-13-09 

SUMMARY: We are adopting a new airworthiness directive (AD) for the products listed above, on which the exhaust thermal insulation has been replaced since January 1, 1995. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

• Due to a lapse in manufacturing quality control, the exhaust thermal insulation of certain Microturbo SA Saphir 2 model 016 auxiliary power units (APUs) may not meet the approved design standard, and may fail in service. The affected part numbers are 016-33-01 (Inner Thermal Insulation), 016-33-02 (Outer Thermal Insulation), and 016-33-03 (EGT Sensor Thermal Insulation). This condition, if not corrected, could result in rapid deterioration and physical breakdown of the exhaust thermal insulation, leading to loss of insulation efficiency and ultimately exposure of the hot APU exhaust section and risk of fire.
   
• We are issuing this AD to prevent rapid deterioration and physical breakdown of the exhaust thermal insulation, leading to loss of insulation efficiency and ultimately exposure of the hot APU exhaust section and risk of fire.

FMI: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/B65A9AEDEDD7235B862575E40052B342?OpenDocument